This lib does not work no node_threads

Hey there, nice work on this lib!

I am having trouble to use on node.js for some reason it does not retry. I am already using axios interceptors for request to put the Bearer JWT Token on place. Any hints?

let api = axios.create({
  baseURL: baseURL,
  headers: {
    'Content-Type': 'application/json',
  },
});
const myRaxConfig = {
  // Retry 3 times on requests that return a response (500, etc) before giving up.  Defaults to 3.
  retry: 3,
  // Retry twice on errors that don't return a response (ENOTFOUND, ETIMEDOUT, etc).
  noResponseRetries: 3,
  // Milliseconds to delay at first.  Defaults to 100. Only considered when backoffType is 'static'
  retryDelay: 1000,
  // HTTP methods to automatically retry.  Defaults to:
  // ['GET', 'HEAD', 'OPTIONS', 'DELETE', 'PUT']
  httpMethodsToRetry: ['GET', 'HEAD', 'OPTIONS', 'DELETE', 'PUT'],
  // The response status codes to retry.  Supports a double
  // array with a list of ranges.  Defaults to:
  // [[100, 199], [429, 429], [500, 599]]
  statusCodesToRetry: [
    [100, 199],
    //[429, 429], 429 eh o retorno de too many requests
    [500, 599],
  ],
  // If you are using a non static instance of Axios you need
  // to pass that instance here (const ax = axios.create())
  instance: api,
  // You can set the backoff type.
  // options are 'exponential' (default), 'static' or 'linear'
  backoffType: 'static',
  // You can detect when a retry is happening, and figure out how many
  // retry attempts have been made
  onRetryAttempt: (err) => {
    const cfg = rax.getConfig(err);
    childLogger.error(`myRaxConfig Retry attempt #${cfg.currentRetryAttempt}`);
  },
};
api.defaults.raxConfig = {
  instance: api,
};
const interceptorId = rax.attach(api);

Simple config, nothing fancy.

I am using basico post methods

 api.post('/delete', {
          myvar: myvar,
        })
        .then(function (response) {
}).catch(function (error) {
         console.log(error);
});

So to test I am shuting down the server and getting ECONNREFUSED but there is no retry on them, it´s going directly to .catch. Any hints? Thanks!

[JustinBeckwith]

Sure! So an HTTP POST could result in changes being made to the state of the data on the server. When you get something like a 500 response code from a web server, that really makes it unclear to any client if the actual changes desired by the request have been reflected on the backend. As a result, retrying a POST request is considered dangerous - after the second POST, you can’t confirm the state of the data on the backend (in a general sense). This is kind of unique to a POST:

• GET doesn’t change the state of the backend
• PUT inserts an item at a specific URL so the worst that can happen is a retry tells you the resource already exists
• DELETE same as put, worse that happens on a retry is that it already has been deleted

… and so on. If you specifically know exactly what your backend will do, and decide that a POST is safe to retry … go for it!

[leopucci]

Solved with some tweaks

const myAxiosInstance = axios.create();
## THIS IS THE GUILTY ONE START##
myAxiosInstance.defaults.raxConfig = {
  instance: myAxiosInstance
};
## THIS IS THE GUILTY ONE END##
const interceptorId = rax.attach(myAxiosInstance);
const res = await myAxiosInstance.get('https://test.local');